gcc/testsuite/gcc.dg/torture/cris-volatile-1.c

   1 /* Copyright (C) 2003  Free Software Foundation.
   2    Check that size-optimizations for move insns (specifically peephole
   3    optimizations) aren't applied to volatile objects in the CRIS port.
   4    Origin: Hans-Peter Nilsson.  */
   5 /* { dg-do compile { target cris-*-* } } */
   6 /* { dg-final { scan-assembler-not {movu\...\[} } } */
   7 /* { dg-final { scan-assembler-not {move\.[^d].\[} } } */
   8 /* { dg-final { scan-assembler-not {and\.[^d].\[} } } */
   9 /* { dg-final { scan-assembler-not {or\.[^d].\[} } } */
  10
  11 static const unsigned long c = 0x0000FF00;
  12 unsigned long
  13 a1 (void)
  14 {
  15   unsigned long m;
  16   m = *(volatile unsigned long*) 0xb00000c8;
  17   m &= c;
  18   return m;
  19 }
  20 extern volatile unsigned long xx;
  21 unsigned long
  22 a2 (void)
  23 {
  24   unsigned long m;
  25   m = xx;
  26   m &= c;
  27   return m;
  28 }
  29 extern volatile unsigned long yy[];
  30 unsigned long
  31 a3 (void)
  32 {
  33   unsigned long m;
  34   m = yy[3];
  35   m &= 0xfe00;
  36   return m;
  37 }
  38 unsigned long
  39 ac1 (void)
  40 {
  41   unsigned long m;
  42   m = *(volatile unsigned long*) 0xb00000c8;
  43   m &= 0xfe00;
  44   return m;
  45 }
  46 extern volatile unsigned long xx;
  47 unsigned long
  48 ac2 (void)
  49 {
  50   unsigned long m;
  51   m = xx;
  52   m &= 0xfe00;
  53   return m;
  54 }
  55 extern volatile unsigned long yy[];
  56 unsigned long
  57 ac3 (void)
  58 {
  59   unsigned long m;
  60   m = yy[3];
  61   m &= 0xfe00;
  62   return m;
  63 }
  64 extern volatile unsigned long yy[];
  65 unsigned long
  66 oc3 (void)
  67 {
  68   unsigned long m;
  69   m = yy[3];
  70   m |= ~0xf;
  71   return m;
  72 }